// 三种主题切换
$themes: (
  red: (
    font-color: red,
    border-image: url(#{$border-image}) ,
  ),
  green: (
    font-color: green,
    border-image: url(#{$border-image}),
  ),
  blue: (
    font-color: blue,
    border-image: url(#{$border-image}),
  ),
  orange: (font-color: orange),
  yellow: (font-color: yellow),
);